(syn. Pachycephala Ϯ Olive Whistler P. olivacea) Portmanteau of genera Timalia Horsfield, 1821, babbler, and Ixos Temminck, 1825, bulbul; "Timixos, Nobis. A puzzling form, as regards its exact position, combining the characters of many different genera. The bill is quite Parian ... Tarsi elongated and slender ... tail even, and otherwise much resembling that of Tricophorus. The wings and tail are tolerably firm, but the rest of the plumage is excessively light, soft, and unsubstantial. T. meruloides, Nobis. ... Locality uncertain." (Blyth 1842); "Timixos meruloides is perhaps Australian" (Blyth 1843); "Timixos Blyth, 1842, Journ. Asiat. Soc. Bengal, 11, p. 194. Type, by monotypy, T. meruloides Blyth = Pachycephala olivacea Vigors and Horsfield." (Mayr in Peters 1967, XII, 8).